Clock striking mechanism.



M. DOWUN. CLOCK STRIKING MECHANlSlI/i.

APPLICATION FILED IIIIIE I4, 1911.

Pawnte Jau. 'L 1918 3 SHEETS-SHEET 2 v'i. DOWLBE.

CLOCK STRIKING MECHANISWL APPLICATION FILED JUNE 14. |911.

1,252,l-0@ mmm m1, 1918.

3 SHEETS-SHEET 3.

y To all whom 'it may concern:

UNITED sTATEsrATENT onirica.

MORRIS DOWLIN'OF HENNIKERyNEW HAMPSHIRE.

yonoci; 'sfrniKiNG ivincHANisM.

i Bea known that i, ineensv Downs, a citizen of the United States, anda resident i of Henniker, in the county of Merrimack and State of New Hampshire, have invented'a new and Improved Clockl Striking Mechanism, of which the following is a full,

clear, and exact description. The object of the invention is to provide a new and improved clock striking mechav nism of `few and simple parts adapted for i 'in which similar characters vofreference indicate' corresponding parts in all the views.

use in connection with any suitable make or model of striking clock and by means of which a clock so provided will sound full hours and fractions of hours indistinct, definite, unmistakable, lappropriate and pleasing sounds to correctly indicate the time of theday 4ornight.

In order to produce ythe desired result, use is made offtwo sounding devices, preferably of different pitch, two governors of differentV power controlling theV striking mechanisms of the said sounding devices,

the said governors being controlled by a' v25` counting mechanism, such as acount wheel `or a rack and snail, to cause striking of the full hours by slow strokes on one sounding device and while both 'governors are Ain action, ofthe preceding hour at a fraction of an hour and at the ytime one of the governors is out of action, to be precededby the sounding of the secondsounding device to denote a fraction of an hour l 'AA practical embodiment ofthe invention is represented in the accompanyingdraw-` ingsgformmg a part of this specication,

Figure 1 is a rear elevationr of the clock striking mechanism as applied and with they housing thereof shown in section;

mechanism Fig. 2 is a sectional front elevation vof they?` same with the time controlling device omitted- Fig. 3 is a rear elevation of the shifting for the slow governor with the parts in a different position from the one shown in Fig. 1;

Fig. 4 is a sectional rear elevation Yof the clock striking mechanism as applied and .with the ytime controlling mechanism omit-, v

ted .Y i

A Fig. 5 is a cross section of the same on the line.5-5 of Fig.4; and

Fig. isa perspective view ofthe cam on and to cause sounding, by fast strokes,V

Way

Specification of Letters Patent. Patented Jan. 1918. Application mea rune 14, i917. seriaiNo. 174,648.

V the hour shaft for moving one ofthe gov- 'ernors out of action. p v

The Y framework 10 carrying the clock movement is secured ina Vsuitable housing 11 and on the said framework isv mounted a. going train 12 driven by-a vspring 13 and a striking train 14 driven by'a spring 15. rFlic going train is of the usual construction and drives the hour arbor 16-but as the said going train forms no part of my improvement further detail description of the same is not deemed necessary. The strikin train con' trols two sounding devices of di'erent pitch, preferably comprising hammers 20, 21, of which the hammer 20 is adapted to strike and sound the hours on agong 22 and-the hammer 2l is adapted to'strikel andsound It isVv under- 28 is secured` a locking arm 29 controlling a 'striking wheel 30 "having pins 31 adapted to engage` an arm 32forming an extension of the` hammer 2O to actuate the latter. The arbor 28 is also provided with a stop arm 35 adapted to engage a stop pin 36 on afwheel 37 in mesh at all times with a pinion 38 attached to an arbor 39 carrying a governor 40. AA second governor 41 ofl larger size than the governor 40 is mounted on an arbor 42 carrying a pinion 43 adapted towmove 4into, and out offmesh with the Awheel-,37.

One end of the arbor 42 is j ournaled on" the -front plate ofthe framework 10 whilethe 4other end of the said arbor'42` is journaled in an arm 45 (see Figs. 1 and 3) pivoted at 46 on the rear plate of the'framewor-k 10. The arm. 45 is pressed on by a spring 47 and its swinging movement is guided by a guide- 48 attached tothe framework 10. The arm 45 is provided with an extension arm 50 engaged by one end of a lever V51 fulcrumedat 52 on the framework 'and pivotally connected at its otherend by a link 53 with an arm 54 fulcrumed at 55 on the framework y1 0, as Aplainly shown in Figs. 2 and 4.. The

, in its speed by the governor e while the other governor 4l is inactive for the time being. It is further understood that ont-he hammer 20 striking the full hour both governors 40 and 4:1 are in action andv consequently the hammer 2O sounds the gong 22 slowly in contradistinction to the tast striking movementat the halt hour. Owing to the double set of notches 26 in the count wheel 25 the beats of the hammer 20 for the full hour Yare 'the same as the beats for the half hour,`only in the latter case the beats arein rapid succession while for the full hour 'the beats are comparatively slow.

The hammer 21 has its arbor (30 provided with an arm 6l extending on the side ot the arbo-r 16 opposite theone on which the arm 54 vis located. The armY 61 is adapted to vbe engaged by the arm 56 and is provided on its free end with va transversely extending pin G2 engaged by an arm (33 depending from an arbor 64. The 'arm (Bis provided. at its free end. with an angular lug G5 (see Fig. adapted to be engaged'by a double,`

armed cam 66 attached to the hour-arbor 16.

The arm G3 forms part of the stop arm' 67 adapted to engage the pin 36; The arbor G-l carries a lifting arm 68 engaging the counting arm 27 to lift the lattero'ut of engagement with the count wheel 25 at every full hourand each half hour owing to the twoarmed cam 66 employed for the purpose. It is understood that the cam 66 is provided with more arms if the'quarter, half and three-quarter hour is to be sounded, and the count wheel 25 is then provided with additional notches for the purpose. y The arbors l 24C, 60, 28 and 'G4 yare pressed on by suitable springs 70, 71, 72 and 73, respectively. By

the arrangement described, the half' hour is sounded by the arm 21 on the bell 23,

prior to the full hour being repeated, by the hammer 20 striking the gong 22.

The operation is as follows:

When the clock is running then the fullr` hours are sounded in slow beats by the ham- Vmer20 on the gong lVhen the half hour is reached'then the hammer 2l vstrikes thev half hour on the bell 23 and this action is immediately followedby the hammer 20 repeatingthe beats of the preceding hour in rapid succession.V Thus a person on hearing the striking` of the hours and half hours readily knows the correct time without see-` vmechanism' is shown and described in conjunction with one type of clock, but it is evident vthat I do not limit myself to this particular application as the clock striking mechanism may be readily applied to any one of the various types of clocks.

F rom the foregoing it will beseen that hour rep-eatingV means are provided for sounding` the Vfull hour and repeating the full hour Yon a fraction of the full hour, and automatic governing` bmeans are connected with thesaid repeating means whereby the repeated full hjour at lthe fraction of Vthe hour issounded at an accelerated speed relative' to the sou'nding'of the full'hour. s l

Having thus described my invention, I claim as new and desire to secure by Lettersy Patent l p y 1. In a clock striking mechanism, hour repeating means sounding thefull hour and repeating the full'hour on a fraction of the full hour, andautomatic governing means for the said repeating means whereby the repeated `full hour at the fraction of the hour ifs-sounded atan accelerated speed relative to the sounding ofthe full hour.

lIn a cloekstriking mechanism, hour repeating means sounding the iull hour and repeating` thefull hour on a fraction' ofthe i'ull hour, automatic governing means for fthe said repeating rmeans `whereby .the reaeated i'ull'houratthe fraction of the hour is sounded at an accelerated speed relative to thesoundmg` of the'tull hour, and means sounding the 'fraction' ofthe'hour at,V the same speed as the repeated full hour and at:

a different pitch and immediately before the, repeated -full hour has been sounded at the fraction of the hour; y

3.111 va clock striking niechamsm, two governors, hour repeating means,'and controlling means'for the said governors rendering one Yof the said governors inactive wherebythe .hour is audibly repeated on a. fraction of the hour at an accelerated rate oi' speed relative to the sounding of lthe hour. l

4. lIn a clock striking mechanism, two

`governors kot different power, hour repeat- 'ing ynieans forsounding the full hour and repeating the hour on a fraction vof the full hour, and controlling meansrendering the vliigjhpower* governor inactive while sounding therepeated full hour and the fraction 0i th-e hour to sound .the same at 'an accelerated speed relative to thesounding of the firstffull hour. y y.

5( Inl a 'clock striking mechanism, a striking strain having a count-wheel provided withhour repeating means, land twoA governorsof which one is in gear at'all'ti'ines `Vith-the said striking train and the'other is periodically out of gear with the said striking train, and means moving the said other governor periodically out of gear.

6. In a clock striking mechanism, a striking train having a count-wheel provided with hour repeating means, two governors of diierent power, of which the low power governor is at alll times in gear with the said striking train and the high power governor is thrown out of gear with the said striking train during the time a fraction of an hour is sounded and the full hour is repeated at a fraction of the hour, and two sounding devices of different pitch, the full hour andthe repeated full hour being sounded by one sounding device and the fraction of the hour being sounded by the other sounding device.

7 In a clock striking mechanism,fa striking train having a count-wheel provided with hour repeating means, two governors of different power of which the low power governor is at all times in gear with the said striking train, a spring-pressed swing arm engaging the high power governor, a lever engaging the said swing arm to move the high power governor periodically out of mesh with the said striking train, a link pivotally connected with the said lever, a pivoted arm connected with the said link, and a cam on the hour arbor and adapted to engage the said pivoted arm at a fraction oi" the full hour.

8. In a clock striking mechanism,nJ strik.- ing train having a counting wheel provided with hour repeating means, a pinion in mesh with one of the gears or' the train and car- ,rying` a governor, a second pinion carrying a governor and meshing with the said gear, a pivoted and spring pressed member in which one end of the arbor of the second pinion is mounted, and means for swinging the said member from the hour arbor at thc fraction of the full hour to move said Second pinion out of mesh with the said gear at the fraction of the full hour.

MORRIS DOWLIN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

